You have two options.

(1) Locate an automatic remote-controlled tuner, outdoors, between the end
of the antenna wire and the coax line to the shack.

(2) Bring the antenna wire right into the shack and use an ordinary manual
tuner between the antenna wire and the rig.

You'll probably notice little difference between the two. And what
difference there is will be due to the different lengths of a random antenna
wire.

For a single-band antenna just connect a fixed L-match network between
antenna and coax or between antenna and rig.

Whatever you do you will need a ground. A counterpoise is a sort of
poor-man's artificial ground. It is a horizontal wire a few feet above
ground level and has resonant properties. Just a single low radial. It is
really a part of the antenna.
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Reg, G4FGQ